The probe would also include former President Luiz Inacio Lula da Silva's 2006 campaign financing.

The prosecutor' office declined to comment on the report.

According to Estado, the request by prosecutor general Rodrigo Janot was based on the plea bargain testimony from Ricardo Pessoa, head of UTC Engenharia.

Pessoa is one of the many executives investigated in the corruption scandal at state-run oil firm Petroleo Brasileiro SA, Brazil's largest ever.

Pessoa said Rousseff's and Lula's campaigns received illegal donations originating from the scheme, which involved kickbacks allegedly paid by construction companies to politicians and former executives at Petrobras, as the oil company is commonly known.

Rousseff and her Workers' Party have repeatedly denied any wrongdoings.